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Main Menu - Block
- Overview
- Anatomy and Histology
- Cryo-Electron Microscopy
- Electron Microscopy
- Flow Cytometry
- Fly Facility
- Gene Targeting and Transgenics
- Immortalized Cell Line Culture
- Integrative Imaging
- Janelia Experimental Technology
- Media Prep
- Molecular Genomics
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- Project Pipeline Support
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Note: Research in this publication was not performed at Janelia.
Abstract
Cluster analysis provides a tool for mapping out regions of ambiguous response in sparse array beamforming problems. This paper discusses clustering and its application to matched field processing (MFP) problems in ocean acoustics. The map of the ambiguity volume provided by clustering can be used for improved interpretation and postprocessing. By peak-picking in cluster space, rather than in spatial dimensions, we are able to identify and discard spatial peaks that result from the presence of a strong source. As shown in a data example, clustering can help collapse 3-D MFP output to bearings-only while preserving signal gains obtained by accounting for multipath. Clustering can also provide computational gains by allowing elimination of highly redundant replicas.